Holy Qur’an 49:13
يا أَيُّهَا النّاسُ إِنّا خَلَقناكُم مِن ذَكَرٍ وَأُنثى وَجَعَلناكُم شُعوبًا وَقَبائِلَ لِتَعارَفوا إِنَّ أَكرَمَكُم عِندَ اللَّـهِ أَتقاكُم إِنَّ اللَّـهَ عَليمٌ خَبيرٌ
O mankind! We created you from a single (pair) of a male and a female, and made you into nations and tribes, that ye may know each other (not that ye may despise (each other). Verily the most honoured of you in the sight of Allah is (he who is) the most righteous of you. And Allah has full knowledge and is well acquainted (with all things).
Hadith
On the day Mecca was conquered, Bilal climbed on the roof of the Ka’bah and performed the call to prayer. One person said: ‘O servants of Allah! How can this black slave be allowed to perform the call to prayer on top of the Ka’bah?’ Another man said: ‘If Allah is displeased, He will change him’.Allah, exalted is He, then revealed this verse 49:13 (O mankind! Lo! We have created you male and female)”